Domino Rhodium-Catalyzed Alkyne Arylation/Palladium-Catalyzed N Arylation: A Mechanistic Investigation
作者:Jane Panteleev、Lei Zhang、Mark Lautens
DOI:10.1002/anie.201103692
日期:2011.9.19
It takes two to tango: A domino multicatalytic synthesis of dihydroquinolines is realized, wherein the products of a rhodium‐catalyzed arylation of alkynes are cyclized by a palladium‐promoted CN cross‐coupling (see scheme). The combination of catalysts with potentially exchangeable ligands is remarkable as each metal–ligand combination affords specific reactivity and selectivity.
Metal–Ligand Binding Interactions in Rhodium/Palladium-Catalyzed Synthesis of Dihydroquinolines
作者:Lei Zhang、Jane Panteleev、Mark Lautens
DOI:10.1021/jo502074s
日期:2014.12.19
A domino Rh- and Pd-catalyzed synthesis of dihydroquinolines is disclosed. Two metals and two ligands are placed in one reaction vessel along with the two reactive reagents to afford selective sequential coupling despite the potential for side reactions. In this report, we describe mechanistic investigations attempting to discern the catalystligand interactions occurring in this domino reaction. Through these studies, the reactivity and relative catalyst ligand loadings were successfully tuned to efficiently access the heterocyclic products.